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Copyright of Journal of Agriculture & Nature / Kahramanmaraş Sütçü İmam Üniversitesi Tarım & Doğa Dergisi is the property of Kahramanmaras Sutcu Imam Universitesi and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Morphological characters, such as body shape, morphometric measurements and meristic counts, have long been used in stock identification. Round goby (Neogobius melanostomus), of the family Gobiidae, is a benthic euryhaline species that is native to central Eurasia. Round goby invasion has had detrimental effects on native fish species and it is included in the list of 100 worst European invasive species. To the best of our knowledge, no previous studies had investigated the morphometric characterization of this species in the region, so the present study aims to give information about the morphometric characteristics of N. melanostomus in the coast of Ordu (Eastern Black Sea). A total of 16 morphological characters were measured using a caliper to the nearest ±0.001 cm. For the subsequent statistical procedures, the ratio of relative morphometric characters to total length (TB) was used. The samples examined were divided into three length groups: group I (10-14.9 cm; 18 samples), group II (15-19.9 cm; 26 samples) and group III (20-24.9 cm; 17 samples). With respect to coefficient of variation, first dorsal fin base length (D1T) was determined as the most variable character, whereas eye diameter (GÇ) was determined as the least variable character. Statistically significant correlations between POU, PA, BD2, D1T, D2T, PU, MxVY, KSY, and TB% were observed (P

Copyright of Electronic Turkish Studies is the property of Electronic Turkish Studies and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In this study, changes of erythrocyte morphology of Tilapia (Oreochromis mossambicus, L.1758) exposing to the different concentrations of lead have been investigated. Fish were exposed to low (0,5 mg L-1), medium (2,5 mg L-1) and high (5 mg L-1) lead concentrations semi-statically during 14 days. At the end of the experiment, important changes in the treatment groups exposed to medium and high lead concentrations were shown than the control group (p<0.05). Medium and high doses of lead red blood cell nucleus area, an important reduction in the length and width compared to the control, while the width of the cell cytoplasmic space and the control group showed a significant increase (p<0.05). It was concluded that increasing lead concentrations might cause hypertrophy, anisocytosis and cariopicnosis in erythrocyte cell morphology of O. mossambicus. [ABSTRACT FROM AUTHOR]